Camera & Lighting: Task 1


Depth of Field & Quantum Optics

DOF- Depth of field

Depth of field (DOF) is defined as the amount of the Mise en Scene in focus.

There are three main factors that are used to control depth of field.

1)      Aperture

2)      Focal Length

3)      Distance

Aperture

Put simply, the smaller the aperture, the more extensive the depth-of-field. So if you want to draw attention to one particular aspect in your scene, a large aperture will allow you to have a sharp focus on a person or object whilst throwing the background out of focus. The aperture you set will depend on the lens you are using, but on a typical 50mm standard lens it will usually be f/1.7, f/1.8 or f/2.

Similarly, if you want to keep as much of your scenes in focus as possible, you should choose as small an aperture as possible depending on your lens – preferably f/16, or, if your lens allows it f/22.

Focal length

Using a wide angle lens will allow you to keep everything in focus and benefit from an extensive depth of field. The wider view you can get from your lens, the greater the depth of field.

Distance

This refers to the distance between the camera and the subject you are filming. The closer you get to your subject, the more limited the depth of field becomes. When shooting close-up subjects, your depth of field can extend to just a few millimetres in front of and behind your subject.

Shutter speed affects blur-motion. The longer time it is open, the more blur you leave.

Light grade chip then set luminescence to 50% will give aperture setting (e.g. F4) after that use light metre to find at ISO by fixing shutter and aperture. Use higher shutter speeds for fast moving objects.

1) 18% grey chip-> check new reflectors

2) Portable light

3) Scopes

QUANTUM OPTICS

As the electron drops down it produces a photon (Light particle), the faster the electron falls the greater the intensity (power) and the higher the frequency the difference in colour (depending on how fast the electron falls depends on the colour).

If material resonates at a lower or higher frequency-photons will travel through the material. If material resonates at the same frequency the photons will be absorbed. If electrons are held loosely the photons will reflect (Bounce off).

 

Image sensors convert photons to electrical energy

Quantum Optics - 1 Quantum Optics - 2